<?xml version="1.0" encoding="UTF-8"?>
<Transformation xmlns="http://www.opengis.net/gml" 
xmlns:gml="http://www.opengis.net/gml" 
xmlns:xlink="http://www.w3.org/1999/xlink" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xsi:schemaLocation="http://www.opengis.net/gml ../gmlGridCRSsProfile.xsd" 
gml:id="TemplateGridElevationModelTransformation">
	<!-- Primary editor: Arliss Whiteside. Last updated 2005-11-15 -->
	<coordinateOperationName>Template for grid elevation model coordinate Transformations</coordinateOperationName>
	<operationVersion>1.0</operationVersion>
	<sourceCRS xlink:href="urn:ogc:def:crs:EPSG:6.3:TBD">
		<!-- This sourceCRS must be 2D. -->
	</sourceCRS>
	<targetCRS xlink:href="urn:ogc:def:crs:EPSG:6.3:TBD">
		<!-- This targetCRS must be 3D. -->
	</targetCRS>
	<usesMethod>
		<OperationMethod gml:id="GridElevationModel">
			<methodName>Grid elevation model</methodName>
			<methodID>
				<name codeSpace="urn:ogc:def:method:OGC:0.0:">GridElevationModel</name>
			</methodID>
			<remarks>This operation method is for a coordinate Transformation that implements an elevation model using grid elevation data. </remarks>
			<methodFormula>The elevation value for the input horizontal position shall be bilinear interpolated between the surrounding four grid points, and added to the input horizontal coordinates. </methodFormula>
			<sourceDimensions>2</sourceDimensions>
			<targetDimensions>3</targetDimensions>
			<usesParameter>
				<OperationParameter gml:id="GridElevationData">
					<parameterName>Grid Elevation Data</parameterName>
					<parameterID>
						<name codeSpace="urn:ogc:def:parameter:OGC:0.0:">GridElevationData</name>
					</parameterID>
					<remarks>The value of this operation parameter is the URL of a source of grid elevation data, in the 3D targetCRS of the coordinate Transformation that contains the value of this operation parameter. </remarks>
				</OperationParameter>
			</usesParameter>
		</OperationMethod>
	</usesMethod>
	<usesValue>
		<valueFile>http://baesystems.com/DEM/TBD</valueFile>
		<valueOfParameter xlink:href="urn:ogc:def:parameter:OGC:0.0:GridElevationData"/>
	</usesValue>
</Transformation>
